Make way for the human catapult.  This dangerous, yet oh so appealing, machine runs off of steam and can launch an average sized person 25 feet into the air.

Unfortunately, you can't buy the AirKick human catapult, but you can rent one...in Germany.

What does this mean?  When studying abroad in Germany, there is now something to do after having way too many beers--you can launch your friends into a pool, down the street, into a neighbors backyard, into a tree...you get the point.